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General Minitrail Talk
Projects/Builds
71K0 just brought out of a LOOONNGG storage.
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<blockquote data-quote="69ST" data-source="post: 155067" data-attributes="member: 5"><p>X2 on the shift for replacements. I see significant wear...and pitting. Where service longevity is concerned, that's a bad combo. Break out the magnifiers and check the contact surfaces on the gears, where the shift forks hit. If the gear faces are pitted in these areas, they'll grind-down shift forks in a hurry. Only bright spot, under that scenario, is that 3-speed gears are usually in decent shape and a dime a dozen. Any 49-72cc tranny is a potential donor, if you need `em.</p><p></p><p>Shift fork & pin replacement is easy, while the tranny is on your bench. Like Pat said, the worst part of an engine rebuild is the scrubbing[SUP]3[/SUP] required.:43:</p><p></p><p>I'll never do my own cylinder boring, "<em>a man's got to know his limitations</em>". It'd take more years than I have remaining to recoup the 5-figure equipment investment. It's not that big a deal to farm-out and there's always new aftermarket in your choice of standard or bore-up flavors. Valve jobs, including seat cutting & lapping, are something I learned while the K0 was the latest & greatest model. If you need assistance, I'm just a PM away.:3:</p></blockquote><p></p>
[QUOTE="69ST, post: 155067, member: 5"] X2 on the shift for replacements. I see significant wear...and pitting. Where service longevity is concerned, that's a bad combo. Break out the magnifiers and check the contact surfaces on the gears, where the shift forks hit. If the gear faces are pitted in these areas, they'll grind-down shift forks in a hurry. Only bright spot, under that scenario, is that 3-speed gears are usually in decent shape and a dime a dozen. Any 49-72cc tranny is a potential donor, if you need `em. Shift fork & pin replacement is easy, while the tranny is on your bench. Like Pat said, the worst part of an engine rebuild is the scrubbing[SUP]3[/SUP] required.:43: I'll never do my own cylinder boring, "[I]a man's got to know his limitations[/I]". It'd take more years than I have remaining to recoup the 5-figure equipment investment. It's not that big a deal to farm-out and there's always new aftermarket in your choice of standard or bore-up flavors. Valve jobs, including seat cutting & lapping, are something I learned while the K0 was the latest & greatest model. If you need assistance, I'm just a PM away.:3: [/QUOTE]
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General Minitrail Talk
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71K0 just brought out of a LOOONNGG storage.
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